Climate averages 1991–2020
Jaffna weather
in April.
A hot, moderately wet month: the warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a hot month in Jaffna: daytime highs average 31.4°C and nights cool to about 27.3°C. By daytime temperature it is the warmest month of the year.
Expect about 45 mm of rain on roughly 8 days, which makes April a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 20 min on an average April day.
The nearest other city in this atlas is Point Pedro (30 km away). In April its highs average 31.7°C, about as warm as Jaffna, with 34 mm of rain.
Among the 12 cities listed in Sri Lanka, Jaffna ranks 4th of 12 for the warmest April highs and 2nd of 12 for the driest April (rainfall, lowest first). The mean April high of those 12 cities is 30.7°C; Jaffna is 0.7°C warmer than that mean.
From April to May, average highs fall by 0.2°C to 31.2°C, and monthly rainfall rises from 45 mm to 58 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Jaffna climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.8°C24.4°C | 24.4°C | 62 | 6.7 | 11.612 h |
| February | 28.1°C24.8°C | 24.8°C | 26 | 4.3 | 11.812 h |
| March | 30.2°C25.9°C | 25.9°C | 22 | 3.3 | 12.112 h |
| April, selected | 31.4°C27.3°C | 27.3°C | 45 | 7.5 | 12.312 h |
| May | 31.2°C28.1°C | 28.1°C | 58 | 7.6 | 12.613 h |
| June | 30.7°C27.9°C | 27.9°C | 27 | 5.6 | 12.713 h |
| July | 30.5°C27.5°C | 27.5°C | 33 | 9.0 | 12.613 h |
| August | 30.3°C27.1°C | 27.1°C | 48 | 10.4 | 12.412 h |
| September | 30.1°C26.9°C | 26.9°C | 67 | 12.1 | 12.212 h |
| October | 29.0°C26.0°C | 26.0°C | 208 | 20.9 | 11.912 h |
| November | 27.6°C25.1°C | 25.1°C | 313 | 22.1 | 11.712 h |
| December | 26.8°C24.7°C | 24.7°C | 199 | 16.3 | 11.612 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Point Pedro in AprilSri Lanka · 30 kmHigh 31.7°C · Low 27.0°C · 34 mm rain
- Pattukkottai in AprilIndia · 113 kmHigh 34.9°C · Low 25.9°C · 41 mm rain
- Nagapattinam in AprilIndia · 123 kmHigh 31.7°C · Low 27.3°C · 36 mm rain
- Kāraikāl in AprilIndia · 140 kmHigh 31.7°C · Low 27.3°C · 31 mm rain
- Kāraikkudi in AprilIndia · 143 kmHigh 35.7°C · Low 25.4°C · 42 mm rain
- Pudukkottai in AprilIndia · 152 kmHigh 36.3°C · Low 25.5°C · 41 mm rain
- Paramagudi in AprilIndia · 156 kmHigh 35.6°C · Low 25.7°C · 64 mm rain
- Thanjavur in AprilIndia · 156 kmHigh 36.7°C · Low 25.9°C · 37 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Jaffna) is explained once on the Jaffna year overview and on the Sources, method and limits page.